Class 10 English Chapter 8 Reference to context – RTC 1

So I rejoiced one day when they sent me out forty miles in the country, to a town called New Mullion, to serve summons on a man called Oliver Lutkins. We needed this man as a witness in a law case,
and he had ignored all our letters.
(a) Who refers to ‘I’ here?
(b) He was sent to serve __________.
(c) Give the noun form of ‘Ignored’.
(d) ______ was a Hack Driver.